the geometric mean of the quantum and solar actions is not a selection effect; it is an algebraic
fact about the UPL.
7.4 Testability
The framework makes specific predictions:
- The UPL should hold at the human scale with and .
- Exoplanetary systems with an asteroid belt at ~2.4 AU and a gas giant at ~9.5 AU should be
more likely to host complex life.
- Systems without these features should be less likely to host complex life.
These predictions are testable with current and future data.
8. Conclusion
We have shown that the human scale emerges as a resonant node between the quantum scale and
the Earth–Moon–Sun scale. The human effective action is the geometric mean of the Planck
constant and the celestial effective action:
With the UPL's one-second resonance, this gives a human energy scale and a
characteristic length-to-mass ratio . The geometric means of particle and
astrophysical masses bracket the human mass range. Extending the cascade to the galactic scale,
we identify the asteroid belt and Saturn as additional resonant nodes.
The human scale is not an arbitrary biological fact. It is the middle rung of a scale hierarchy that
spans from the proton to the galaxy. This suggests a quantitative framework for astrobiology: the
conditions for human-scale intelligence may be geometrically fixed, and the search for life
should target systems with the same resonant architecture.
References
[1] Beardsley, I. (2026). Scale Invariance and Fractal Features in Cosmology: A Computational
Study. Zenodo. https://doi.org/10.5281/zenodo.23045265
[2] Beardsley, I. (2026). The Human Scale and Natural Laws.
[3] Tiesinga, E., Mohr, P. J., Newell, D. B., & Taylor, B. N. (2024). CODATA Recommended
Values of the Fundamental Physical Constants. NIST.